U.S. patent number 5,564,918 [Application Number 08/472,949] was granted by the patent office on 1996-10-15 for gas torch.
Invention is credited to Arlo H. T. Lin.
United States Patent |
5,564,918 |
Lin |
October 15, 1996 |
Gas torch
Abstract
A gas torch including a fuel gas container, a nozzle tube
horizontally mounted on the fuel gas container, an ignition device,
an ignition control button for triggering the ignition device to
produce sparks, a guard covered around a part of the nozzle tube
and a part of the ignition control button, a gas lever controlled
to release fuel gas from the fuel gas container into the nozzle
tube, and a flame adjustment wheel for regulating the flow rate of
fuel gas, wherein an actuating plate is mounted on the fuel gas
container around the gas lever and driven to move the gas lever
between the operative position and the non-operative position; a
switching lever is mounted on the fuel gas container and driven by
the ignition control button to move the actuating plate in lifting
the gas lever to the operative position; a push rod is extended out
of the guard for moving the actuating plate backward in releasing
the gas lever.
Inventors: |
Lin; Arlo H. T. (Wu Fong,
Hsiang, Taichung Hsien, TW) |
Family
ID: |
23877551 |
Appl.
No.: |
08/472,949 |
Filed: |
June 6, 1995 |
Current U.S.
Class: |
431/255; 431/266;
431/344 |
Current CPC
Class: |
F23D
14/28 (20130101); F23D 14/38 (20130101) |
Current International
Class: |
F23D
14/38 (20060101); F23D 14/28 (20060101); F23D
14/00 (20060101); F23D 014/28 () |
Field of
Search: |
;431/344,345,255,256,266,277 ;126/401,405-407,413,414 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Yeung; James C.
Attorney, Agent or Firm: Pro-Techtor International
Claims
I claim:
1. A gas torch comprising:
a fuel gas container,
a nozzle tube mounted on said fuel gas container,
an ignition device,
an ignition control button that when pushed activates said ignition
device,
a guard that covers a part of said nozzle tube and a part of said
ignition control button, said guard has a push rod extending
therefrom,
a gas lever that controls the flow of fuel gas from said fuel gas
container to said nozzle tube, and
a flame adjustment wheel to regulate the amount of fuel gas that
flows from said fuel gas container to said nozzle tube; wherein
said ignition control button, in addition to activating said
ignition device, causes a switching lever mounted on said fuel gas
container to move an actuating plate also mounted on said fuel gas
container, said actuating plate moves said gas lever from a
non-operative position to an operative position, allowing fuel gas
to flow from said fuel gas container to said nozzle tube where said
fuel gas is ignited by sparks generated by said ignition device,
and
said push rod drives said actuating plate to its initial position,
causing said gas lever to return to its non-operative position.
2. The gas torch of claim 1 wherein:
said actuating plate includes a sloping wall and an oblong slot
that receives the gas lever therein,
said sloping wall driving said gas lever from said non-operative
position to said operative position when said actuating plate is
moved by said switching lever.
3. The gas torch of claim 1 wherein:
said switching lever turns about a pivot on a support, said
switching lever has a top end situated so as to be contacted by
said ignition control button when said ignition control button is
depressed, said switching lever has a bottom end connected to said
actuating plate.
4. The gas torch of claim 1 wherein:
said actuating plate includes a rear opening to receive said
switching lever, said actuating plate further includes a rear
extension strip connected to said push rod.
Description
BACKGROUND OF THE INVENTION
The present invention relates to a gas torch, and relates more
particularly to such a gas torch which includes a push rod and an
actuating plate driven by the push rod to stop fuel gas.
Various gas torches have been developed for use in burning or
welding things. These gas torches commonly comprise a fuel gas
container, a nozzle tube horizontally mounted on the fuel gas
container, an ignition device, an ignition control button for
triggering the ignition device to produce sparks, and a flame
adjustment wheel for regulating the flow rate of fuel gas. During a
welding operation, the gas torch may have to be frequently operated
to temporarily stop the flame. However, it is inconvenient to
frequently turning the flame adjustment wheel in order to stop the
flame.
SUMMARY OF THE INVENTION
The present invention has been accomplished to provide a gas torch
which eliminates the aforesaid drawback. According to the present
invention, an actuating plate is mounted on the fuel gas container
around the gas lever and driven to move the gas lever in releasing
fuel gas from the gas container, a switching lever is pivotably
mounted on an upright support on the top side of the fuel gas
container and driven by the ignition control button of the gas
torch to move the actuating plate in lifting the gas lever to the
operative position, and a push rod is installed for moving
actuating plate backward in releasing the gas lever.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an elevational view of a gas torch according to the
present invention;
FIG. 2 is a front view of the gas torch shown in FIG. 1, showing
the guard removed;
FIG. 3 is an enlarged view of the upper part of FIG. 2;
FIG. 4 is a perspective view in an enlarged scale of the actuating
plate, the gas lever, the upright support, and the switching lever
according to the present invention;
FIG. 5 is similar to FIG. 3, showing the position of the ignition
control button relative to the switching lever before the
operation; and
FIG. 6 is similar to FIG. 5 but showing the ignition control button
depressed and the actuating plate moved by the switching lever.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to FIGS. 1, 2, and 3, a gas torch in accordance with the
present invention comprises a fuel gas container 10, a nozzle tube
20 horizontally mounted on the top side of the fuel gas container
10, an ignition control button 30 mounted on the rear end of the
nozzle tube 20, a guard 40 covered around the rear part of the
nozzle tube 20 and the front part of the ignition control button
30, an air intake control wheel 50 mounted on the nozzle tube 20 in
front of the guard 40, a flame adjustment wheel 60 mounted on the
top side of the fuel gas container 10 and partially extended out of
the guard 40 for regulating the flow rate of fuel gas, and a push
rod 70 inserted into a hole (not shown) on the guard 40.
Referring to FIGS. 3 and 4, an actuating plate 80 is mounted on the
top side of the fuel gas container 10, having a front bent 81, a
downward sloping wall 83 extended from the front bent 81, an oblong
slot 82 on the downward sloping wall 83 for mounting a gas lever
61, a rear opening 84, an upright stop wall 85 at one side of the
rear opening 84, and a rear extension strip 86 coupled to the push
rod 70. A support 90 is mounted on the top side of the fuel gas
container 10 adjacent to the rear extension strip 86 to hold a
switching lever 91. The switching lever 91 is turned about a pivot
910 on the support 90, having a bottom end 92 stopped at the
upright stop wall 85 and a top end 93 facing the rear end 300 of
the ignition control button 30.
FIG. 5 shows the ignition control button 30 disposed in the
non-operative position. When the ignition control button 30 is
depressed to force the rear end 300 against the top end 93 of the
switching lever 91 as shown in FIG. 6, the switching lever 91 is
turned about the respective pivot to move the actuating plate 80,
causing the gas lever 61 moved upwards by the sloping wall 83 to
release fuel gas from the fuel gas container 10 into the nozzle
tube 20, and at the same time the ignition mechanism (see FIG. 3)
of the gas torch is triggered by the ignition control button 30 to
produce sparks, causing a flame produced at the front end of the
nozzle tube 20.
Referring to FIGS. 1 and 2 again, when the push rod 70 is pushed
inwards, the actuating plate 80 is moved back to its former
position, and therefore the gas lever 61 is forced back to its
former position by a spring (not shown), causing the fuel gas
passage closed.
It is to be understood that the drawings are designed for purposes
of illustration only, and are not intended as a definition of the
limits and scope of the invention disclosed.
* * * * *